Automobile Engineering MCQs

Question 1

In case of a Diesel car, the pressure at the end of compression is of the order of

Accepted Answer

45 bar

Answer

15 bar

Answer

25 bar

Answer

35 bar

Question 2

The crankcase dilution means

Accepted Answer

Dilution of lubrication oil by fuel in the crankcase

Answer

Dilution of fuel in the crankcase

Answer

Dilution of oil by water in the crankcase

Answer

Dilution of mixture passing through crankcase in two stroke engines

Question 3

The basic purpose of tyres is to

Accepted Answer

Grip the road and provide good traction

Answer

Substitute for springs

Answer

Act as brake

Answer

None of these

Question 4

The engine oil level should be checked

Accepted Answer

A few minutes after the ignition switch is turned off

Answer

Immediately after the ignition switch is turned off

Answer

While the engine is running

Answer

While the engine is running at high idle speed

Question 5

The most commonly used supplementary restraint system (SRS) component is

Accepted Answer

Airbag

Answer

Seat belt

Answer

Brake

Answer

Steering

Question 6

The most effective method of controlling S.I. engine exhaust emission is by

Accepted Answer

Using catalytic converter

Answer

Recirculating exhaust

Answer

Using some additives in the fuel

Answer

None of these

Question 7

The main function of an exhaust muffler is the

Accepted Answer

Reduction of exhaust noise

Answer

Optimization of exhaust efficiency

Answer

Reduction of nitrogen oxide in the exhaust gases

Answer

Reduction of the exhaust gas volume

Question 8

The fuel pump of a programmed fuel injection (PFI) system operate for two seconds when the ignition is turned to the start position to

Accepted Answer

Pressurise the fuel system before the engine is started

Answer

Enable the pump's fault diagnosis function to operate

Answer

Warm up and lubricate the pump

Answer

Supplies a large amount of fuel and thereby creates a choke effect

Question 9

The information provided by the oxygen (O2) sensor to the feedback control system is about the

Accepted Answer

Air-fuel ratio

Answer

Air temperature

Answer

Air flow speed

Answer

Exhaust gas volume